well, one answer is forever - because it is always being improved upon. There is a lot more equipment in there now than you see in the pictures in this post. To get the room to the level you see in this post was about a year. There are many layers of different kinds of sound-proofing in the walls that all took time. And the sound baffles (the black panels on the walls) had to be made and tested out to get good acoustics in the room. Placement of speakers, amps, and mics to prevent feedback and to optimize sound quality all took time. Things like that.
well, one answer is forever - because it is always being improved upon. There is a lot more equipment in there now than you see in the pictures in this post. To get the room to the level you see in this post was about a year. There are many layers of different kinds of sound-proofing in the walls that all took time. And the sound baffles (the black panels on the walls) had to be made and tested out to get good acoustics in the room. Placement of speakers, amps, and mics to prevent feedback and to optimize sound quality all took time. Things like that.
Looking again at this room, I can say that it worth the whole work and time spent to make it so great. I can only say congratulations!